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Elevated endothelin levels in patients with hyperlipoproteinemia
1Medizinische Klinik I, Johann Wolfgang Goethe-Universität, Frankfurt am Main, Germany.
Insights
Elevated endothelin levels are linked to hyperlipidemia, particularly with high cholesterol and lipoprotein(a). This suggests endothelin may contribute to atherosclerosis development in these patients.
Area of Science:
- Cardiovascular Research
- Endocrinology
- Lipid Metabolism
Background:
- Hyperlipidemia is a significant risk factor for cardiovascular disease.
- Endothelin is a potent vasoconstrictor with potential roles in vascular pathology.
- Understanding molecular markers associated with hyperlipidemia is crucial for risk assessment.
Purpose of the Study:
- To investigate the relationship between endothelin levels and lipid profiles in hyperlipidemia patients.
- To explore correlations between endothelin, lipoproteins, and apolipoproteins.
- To assess the potential role of endothelin in the pathophysiology of hyperlipidemia.
Main Methods:
- Measurement of lipoproteins, apolipoproteins, and endothelin in 98 hyperlipidemia patients and 50 healthy controls.
- Statistical analysis to determine correlations and group differences.
- Stratification of patients based on cholesterol levels, lipoprotein(a) concentrations, and smoking status.
Main Results:
- Endothelin levels were significantly elevated in hyperlipidemia patients compared to controls.
- Higher endothelin and lipoprotein(a) concentrations were observed in patients with plasma cholesterol > 2.5 g/l.
- Positive correlations were found between endothelin and apolipoprotein B, and between endothelin and lipoprotein(a) in smokers.
Conclusions:
- Elevated endothelin may contribute to increased vascular tone in hyperlipidemia.
- Endothelin's mitogenic properties suggest a role in premature atherosclerosis development in hyperlipidemic individuals.
- Endothelin emerges as a potential biomarker and therapeutic target in managing hyperlipidemia-associated cardiovascular risks.
Abstract:
We determined lipoproteins, apolipoproteins, and endothelin in 98 patients (58 female and 40 male, age 18-72 years) with hyperlipidemia (plasma cholesterol > 2.5 g/l and/or triglycerides > 2.0 g/l) and in 50 healthy subjects (20 female, 30 male, age 19-68 years). In patients with hyperlipidemia endothelin levels were elevated compared to healthy controls. Patients with plasma cholesterol above 2.5 g/l had higher endothelin and lipoprotein(a) concentrations than patients with plasma cholesterol levels less than 2.5 g/l. A positive correlation was found between the concentrations of endothelin and apolipoprotein B (r = 0.2137; P < 0.013). Smoking patients with lipoprotein (a) above 300 mg/l had higher endothelin levels than both nonsmoking patients with lipoprotein (a) above 300 mg/l and smokers with normal lipoprotein(a). In smokers endothelin correlated positively with Lp(a) (r = 0.709; P < 0.01). No correlation was found between endothelin and triglycerides nor between endothelin and age or sex. The results suggest that the vasoconstrictor endothelin contributes to the increased vasal tone in hyperlipidemia. Because endothelin also has mitogenic properties, it may play a relevant role in the development of premature atherosclerosis in patients with hyperlipidemia.